19
CUV-100 TERMINAL VOLTAGES
TROUBLESHOOTING UV SYSTEM
TROUBLESHOOTING
TERMINAL
DESCRIPTION
FAN OFF FAN ON EXT. FIRE
L1
Main Power Connection : Hot
120 VAC 120 VAC
120 VAC
L2
Main Power Connection : Neutral
1
Output to Supply Fan Motor Starter
0 VAC
120 VAC
0 VAC
5
120 VAC Neutral Leg
8
Output to Exhaust Fan Motor Starter
0 VAC
120 VAC
120 VAC
FS1
FS2
Supply Fan Fire Switch Connections
N.C. Contacts
Closed
Closed
Open
FS3
FS4
Exhaust Fan Fire Switch Connections
N.O. Contacts
Open
Open
Closed
1U
Input from "UV System On" (Green)
0 VAC
*
*
2U
Input from "UV Lamp Failure" (Amber)
0 VAC
*
*
3U
Input from "UV Safety Interlock Activated"
(Red)
0 VAC
*
*
5U
120 VAC Neutral Leg
6U
Output to UV Lamps Contactor
0 VAC
120 VAC
120 VAC
120 VAC - when UV lights should be on
0 VAC - when UV lights should be off
(Refer to UV Status Light Chart on following page)
High Voltage Common
High Voltage Common
Common